401772451 has 4 divisors (see below), whose sum is σ = 402303952. Its totient is φ = 401240952.

The previous prime is 401772439. The next prime is 401772463. The reversal of 401772451 is 154277104.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (401772439) and next prime (401772463).

It is a cyclic number.

It is not a de Polignac number, because 401772451 - 2⁵ = 401772419 is a prime.

It is a super-2 number, since 2×401772451² = 322842204765094802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401772491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 264615 + ... + 266128.

It is an arithmetic number, because the mean of its divisors is an integer number (100575988).

Almost surely, 2^401772451 is an apocalyptic number.

401772451 is a deficient number, since it is larger than the sum of its proper divisors (531501).

401772451 is an equidigital number, since it uses as much as digits as its factorization.

401772451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531500.

The product of its (nonzero) digits is 7840, while the sum is 31.

The square root of 401772451 is about 20044.2622962283. The cubic root of 401772451 is about 737.8929904357.

The spelling of 401772451 in words is "four hundred one million, seven hundred seventy-two thousand, four hundred fifty-one".